Description

This is a plugin for WordPress that provides multifactor authentication with one-time passwords using the Yubikey USB token.
The plugin uses the Yubico Web service API in the authentication process.
The one-time password requirement can be enabled on a per user basis.

Screenshots

Entering Key ID on the profile page

Entering Yubico ID & API key on Yubikey options page.

The enhanced loginbox.

The Yubikey itself.

Installation

Enter Yubico ID & API key on the Settings -> Yubikey options page.
Id/key confused ? Well the Key ID is the first 12 chars from the output Your Yubikey generates,
they don’t change, the Yubico ID and API Key is used when communicating with the Yubico authentication server.

FAQ

How much does the Yubikey cost ?

A single Yubikey is $25

Are there any special requirements for my WordPress/PHP installation ?

PHP5 with Hash & Curl libs enabled.

I have a lot of users on my WordPress installation, do they all need Yubikeys ?